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Geoff Molloy

Geoff Molloy. Communications and Computing Branch Bureau of Meteorology Australia. Background. The idea was partly based on two existing networks: RMDCN. British Telecom (BT) Frame Relay links between Melbourne-Singapore-Jakarta. The RMDCN.

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Geoff Molloy

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  1. Geoff Molloy Communications and Computing Branch Bureau of Meteorology Australia

  2. Background • The idea was partly based on two existing networks: • RMDCN. • British Telecom (BT) Frame Relay links between Melbourne-Singapore-Jakarta

  3. The RMDCN • Virtual Private Network based on Frame Relay PVCs • Guaranteed bandwidth ( CIR ) • Ability to take advantage of unused network capacity ( EIR ) • PVC costs are in function of the CIR and the location of the end-points • No limit to the number of Sites that can be connected • No limit to the number of PVCs that can be established • TCP/IP is used as a transport protocol • Fully managed Cisco routers • Connection via a PTT access line to the in-country POP • Backup service ( ISDN, PSTN, dual access line )

  4. Phases • implementation of the Improved MTN project should be a progression. In its first stage (Phase I), there would be a mix of “clouds” and existing point-to-point links. • Phase I should therefore evolve quickly towards Phase II in which all the MTN links would be provided via a small number of “clouds” or Managed networks – e.g. frame relay.

  5. Tokyo 64 X.25 0.2 New Delhi Washington Bangkok Manila Fax Guam 19.2 X.25 56 X.25 9.6 X.25 Honolulu 1.2 64 TCP/IP 2.4 X.25 AFTN+GTS 9.6 X.25 Brunei Micronesia AFTN+GTS 9.6 X.25 Bracknell Kuala Lumpur 2.4 X.25 Pago-Pago NO 1.2 ASMC Singapore NO FR 64 (CIR:4) TCP/IP (+ X.25) Apia Honiara Port Moresby FR 64 (CIR:8) TCP/IP Jakarta Internet 28.8* RTH 4.8 TCP/IP Papeete 9.6 TCP/IP RSMC Nadi FR 64 (CIR:8) TCP/IP (+ X.25) NMC RSMC Darwin Port Vila Fax 4.8 X.25 Centre in other region FR 64 (CIR-16) TCP/IP Noumea FR 512 (CIR:128) MTN circuit Fax 9.6 X.25 Melbourne Regional circuit Internet 256* NO Not operational CIR Committed Information Rate (Frame Relay links) Interregional circuit Wellington Additional circuit Internet 256* Peak speed through Internet 31.VIII.2000 radio broadcast Regional Meteorological Telecommunication Network for Region V (South-West Pacific)point-to-point circuits implementation (transmission speed in Kbit/s)

  6. Network A RA VI RMDCN Network B MTN PVC through Network Inter-Regional PVC through Network Existing point to point links Existing network RTH - MTN Gateway RTH Figure 6.2.2: The IMTN, Phase I: Example of possible Implementation of the MTN - New Delhi Bracknell Moscow Prague Beijing Tokyo Sofia Washington Offenbach Cairo Toulouse Jeddah Nairobi Dakar Algiers Melbourne Buenos Aires Brasilia Access line to Network Services Mixed use of Data Communication Network Services and point-to-point circuits

  7. Network D Network C RA VI RMDCN Network B Network A New Delhi Moscow Beijing Bracknell Prague Jeddah Tokyo Sofia Washington Offenbach Cairo Toulouse Algiers Nairobi Melbourne Buenos Aires Brasilia Dakar Existing Network Services Network-to Network Interconnection New possible Network Services Access line to Network Services RTH- MTN Gateway RTH Figure 6.2.1: The IMTN, Phase II: Example of possible implementation of the MTN - use of Data Communication Network Services

  8. Why a managed Network? • Potential advantages include: • Cost-effectiveness compared to dedicated leased lines. Also economy of scale likely to result in significant discounts. • Burst capability – ideal for timely receipt of large volume of data for a short period of the day (eg model data) • Ability to increase link capacity easily and quickly – no need to order new line. • Ability to add additional links quickly and cheaply. • High availability – option to have fully managed service and ISDN backup

  9. MOU key to flexibility • Drafting a Memorandum of Understanding (MoU) among the centres • ·Responsibilities of each centre; • ·Method of procurement of the service; • ·Funding of the various stages; • ·On-going coordination and management of the relationship with the supplier; • ·Procedure for adding another centre to the cloud, etc.

  10. FRAME RELAY SCHEMATIC (INFONET by Telstra) Dorval, Canada 128K Washington NWS USA 256K Tokyo, Japan 16K 256K <-16K/8k-> 32K NESDIS 128K 32K 256K 64K Bracknell UK <-16K/8k-> 8K 16K <-16K/8k-> 8K 64K 16K Pretoria, South Africa 8K 64K Brasilia Brazil 64K 128K Buenos Aires Argentina a plan by Telstra [ Consolidate Network A with B ] Melbourne Australia

  11. Hong Kong Washington HKT Frame Relay NNI Gateway FR Port U.S.A. FR Port Australia FR Port Japan INFONET Frame Relay KDDI Frame Relay NNI Gateway Local Line Tokyo Melbourne NNI Gateway NNI Gateway FR Port U.K. CAT Frame Relay DACOM Frame Relay Bracknell Bangkok Seoul IMTN Network B a plan by KDDI [ Consolidate Network B with Region II Links ]

  12. Melbourne – Tokyo – Washington – Bracknell network • Quotes were sought from leading providers for this network – Worldcomm, Sprint, BT. Also a quote was sought from Equant under the RMDCN contract. •  At this time (September 2002) at appears that this network will be a service from BT for 3 years • Unsymetric PVCs

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